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/* SPDX-License-Identifier: GPL-2.0-only */
#include <string.h>
#include <acpi/acpigen.h>
#include <device/device.h>
#include <device/pci.h>
#include "pciehp.h"
void intel_acpi_pcie_hotplug_generator(u8 *hotplug_map, int port_number)
{
int port;
int have_hotplug = 0;
for (port = 0; port < port_number; port++) {
if (hotplug_map[port]) {
have_hotplug = 1;
}
}
if (!have_hotplug) {
return;
}
for (port = 0; port < port_number; port++) {
if (hotplug_map[port]) {
char scope_name[] = "\\_SB.PCI0.RP0x";
scope_name[sizeof("\\_SB.PCI0.RP0x") - 2] = '1' + port;
acpigen_write_scope(scope_name);
/*
Device (SLOT)
{
Name (_ADR, 0x00)
Method (_RMV, 0, NotSerialized)
{
Return (0x01)
}
}
*/
acpigen_write_device("SLOT");
acpigen_write_name_byte("_ADR", 0x00);
acpigen_write_method("_RMV", 0);
/* ReturnOp */
acpigen_emit_byte (0xa4);
/* One */
acpigen_emit_byte (0x01);
acpigen_pop_len();
acpigen_pop_len();
acpigen_pop_len();
}
}
/* Method (_L01, 0, NotSerialized)
{
If (\_SB.PCI0.RP04.HPCS)
{
Sleep (100)
Store (0x01, \_SB.PCI0.RP04.HPCS)
If (\_SB.PCI0.RP04.PDC)
{
Store (0x01, \_SB.PCI0.RP04.PDC)
Notify (\_SB.PCI0.RP04, 0x00)
}
}
}
*/
acpigen_write_scope("\\_GPE");
acpigen_write_method("_L01", 0);
for (port = 0; port < port_number; port++) {
if (hotplug_map[port]) {
char reg_name[] = "\\_SB.PCI0.RP0x.HPCS";
reg_name[sizeof("\\_SB.PCI0.RP0x") - 2] = '1' + port;
acpigen_emit_byte(0xa0); /* IfOp. */
acpigen_write_len_f();
acpigen_emit_namestring(reg_name);
/* Sleep (100) */
acpigen_emit_byte(0x5b); /* SleepOp. */
acpigen_emit_byte(0x22);
acpigen_write_byte(100);
/* Store (0x01, \_SB.PCI0.RP04.HPCS) */
acpigen_emit_byte(0x70);
acpigen_emit_byte(0x01);
acpigen_emit_namestring(reg_name);
memcpy(reg_name + sizeof("\\_SB.PCI0.RP0x.") - 1, "PDC", 4);
/* If (\_SB.PCI0.RP04.PDC) */
acpigen_emit_byte(0xa0); /* IfOp. */
acpigen_write_len_f();
acpigen_emit_namestring(reg_name);
/* Store (0x01, \_SB.PCI0.RP04.PDC) */
acpigen_emit_byte(0x70);
acpigen_emit_byte(0x01);
acpigen_emit_namestring(reg_name);
reg_name[sizeof("\\_SB.PCI0.RP0x") - 1] = '\0';
/* Notify(\_SB.PCI0.RP04, 0x00) */
acpigen_emit_byte(0x86);
acpigen_emit_namestring(reg_name);
acpigen_emit_byte(0x00);
acpigen_pop_len();
acpigen_pop_len();
}
}
acpigen_pop_len();
acpigen_pop_len();
}
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